2.4 GHz multiprotocol RF transceiver 128 bit encryption 256kB flash & 16kB RAM Programmable Peripheral Interconnect () Digital interfaces: SPI, I2C, UART 10 bit ADC Programmable output power: -20 to +4 dBm application development and protocol stack Fully compatible with NRF24L series Pinout compatible with NRF51xxx series Global separate power management Operating voltage: 1.8 V ~ 3.6 V Applications: Wearable devices Bluetooth intelligent application Mobile RFID labels Smart Industry control Data acquisition system Type: Bluetooth Module Model Number:NRF51822 color:Black Material:PCB size:19.95 x 15.12 x 2mm Package Contents: 1 x Bluetooth 2.4G Wireless Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.